Keyhole protector



R. BEHRENDT 1,846,078

EEEEEEEEEEEEEE OR g. I f @M ATTORNEY Patented Feb. 23, 1932 UNITEDSTATES ROBERT BEHRENDT, OF ALT'OONA, IiENNSYLVANI,

KEYHOLE PROTECTOR Application tiled May 31, 1930. Serial No.` 458,270.

This invention relates to improvements in protecting devices,particularly to a key-hole protector, and it is the principal object ofmy invention to provide such a protector adapted f to be readilyattached over a key-hole to close the same against peepers, etc., and toprevent its removal from the outside by the insertion of a key, or othermeans.

Another object of my invention is the provision of a key-hole protectorof comparatively simple and inexpensive construction, yet durable andefficient in its operation.

A further object of my invention is the provision of a key-holeprotector equipped with means forlocking the protector in its keyholeprotecting position.

A still further object of my invention is the provision of a key-holeprotector compris ing a spring controlled rotary member carrying a latchadapted to enter a key-hole and upon its rotation for 90 to hold theprotector in its operative position.

These and other objects and advantages of my invention will become morefully known as the description thereof proceeds, and will then bespecifically defined in the appended claims.

In the accompanying drawings forming a material part of this disclosure:

F ig. 1 is an inner front elevation of a door equipped with a key-holeprotector construct-- ed according to my invention.

Fig. 2 is a fragmentary sectional side-elevation of a door lock with thekey-hole protector in position thereon, on a somewhat enlarged scale.

Fig. 3 is a fragmentary front elevation of a door lock on an enlargedscale with the keyhole protector in position to protect the keyhole.

F ig. 4L is a longitudinal section through the key-hole protector.

Fig. 5 is an inner end View of the key-hole protector.

As illustrated, the key-hole protector comprises a rubber protectingcupy 10 which has formed therewith a cylinder 11 into which telescopes arotary member 12, circular in cross-section and carrying an outer heador operating knob 13.

Integrally madewith member l2 and centrally located therein is a rod 1liextending through member 12, cylinder 11 into cup 10 where it carri-es alatch 15.

A spring 2() is wound about rod 14 within 55 the cylinder 1l and restsat one end against the inner end of member 12 while its other end restsagainst the bottom plate 16 of cylinder 11.

The device operates as follows:

If it is desired to protect a key-hole of a lock 17 against a peeper orinsertion of a key, the cup 10 is firmly pressed against the front plate18 of the lock, and the member 12 is then pressed inwardly by means ofits knob and turned for 90, the latch 15 will assume the position shownin Figure 3 behind the key-hole 19 and will be held in this position bythe spring 20, and thus prevent the removal of the key-hole protector bypushing it out of its protective position from the outside of the doorand by inserting a ke It will be understood that I have described andshown the preferred form of my device only, and that I may make suchchanges in its construction as come within the scope of the appendedclaims without departure from my invention.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent is:

1. A key-hole protector comprising a protecting cup adapted to besecured over a key-hole, a cylinder formed therewith, a rotary membertelescoping into said cylinder an operating knob on said member, a roformed with said member extending through said cylinder into said cup, alatch at the end of said rod within said cup, and a spring wound aboutsaid rod within said cylinder adapted to be tensioned upon the inwardmovement of said member and locking by its expansion said latch upon itsrotation by said member into locking position in such position.

2. A key hole protector of the class described, comprising a cylinder, abottom plate formed with said cylinder, a rubber cup adapted to engagethe key-hole plate in which said bottom plate is enclosed, a rotarymember telescoping into said cylinder, a rod integral with said memberextending throu h the same, the cylinder and the cup into t e key hole,a latch carried by the outer end of said rod, a spring Wound about therod part within said cylinder resting at one end against said member andat its opposite end against the bottom plate of the cylinder, and anoperating knob on said member` and rod allowing a rotation of said latchto bring the latch into position for protecting 'the key-hole againstinsertion of a key, and removal of the protector.

In Witness whereof Ivhave signedmy name to this specification.

` ROBERT BEHRENDT.

